[linux-block.git] / include / linux / inetdevice.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_INETDEVICE_H
#define _LINUX_INETDEVICE_H

#ifdef __KERNEL__

#include <linux/bitmap.h>
#include <linux/if.h>
#include <linux/ip.h>
#include <linux/netdevice.h>
#include <linux/rcupdate.h>
#include <linux/timer.h>
#include <linux/sysctl.h>
#include <linux/rtnetlink.h>
#include <linux/refcount.h>

struct ipv4_devconf {
	void	*sysctl;
	int	data[IPV4_DEVCONF_MAX];
	DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
};

#define MC_HASH_SZ_LOG 9

struct in_device {
	struct net_device	*dev;
	netdevice_tracker	dev_tracker;

	refcount_t		refcnt;
	int			dead;
	struct in_ifaddr	__rcu *ifa_list;/* IP ifaddr chain		*/

	struct ip_mc_list __rcu	*mc_list;	/* IP multicast filter chain    */
	struct ip_mc_list __rcu	* __rcu *mc_hash;

	int			mc_count;	/* Number of installed mcasts	*/
	spinlock_t		mc_tomb_lock;
	struct ip_mc_list	*mc_tomb;
	unsigned long		mr_v1_seen;
	unsigned long		mr_v2_seen;
	unsigned long		mr_maxdelay;
	unsigned long		mr_qi;		/* Query Interval */
	unsigned long		mr_qri;		/* Query Response Interval */
	unsigned char		mr_qrv;		/* Query Robustness Variable */
	unsigned char		mr_gq_running;
	u32			mr_ifc_count;
	struct timer_list	mr_gq_timer;	/* general query timer */
	struct timer_list	mr_ifc_timer;	/* interface change timer */

	struct neigh_parms	*arp_parms;
	struct ipv4_devconf	cnf;
	struct rcu_head		rcu_head;
};

#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
#define IPV4_DEVCONF_ALL(net, attr) \
	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)

static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
{
	index--;
	return in_dev->cnf.data[index];
}

static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
				    int val)
{
	index--;
	set_bit(index, in_dev->cnf.state);
	in_dev->cnf.data[index] = val;
}

static inline void ipv4_devconf_setall(struct in_device *in_dev)
{
	bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
}

#define IN_DEV_CONF_GET(in_dev, attr) \
	ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
#define IN_DEV_CONF_SET(in_dev, attr, val) \
	ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))

#define IN_DEV_ANDCONF(in_dev, attr) \
	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
	 IN_DEV_CONF_GET((in_dev), attr))

#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
	(IPV4_DEVCONF_ALL(net, attr) || \
	 IN_DEV_CONF_GET((in_dev), attr))

#define IN_DEV_ORCONF(in_dev, attr) \
	IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)

#define IN_DEV_MAXCONF(in_dev, attr) \
	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
	     IN_DEV_CONF_GET((in_dev), attr)))

#define IN_DEV_FORWARD(in_dev)		IN_DEV_CONF_GET((in_dev), FORWARDING)
#define IN_DEV_MFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
#define IN_DEV_BFORWARD(in_dev)		IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
#define IN_DEV_RPFILTER(in_dev)		IN_DEV_MAXCONF((in_dev), RP_FILTER)
#define IN_DEV_SRC_VMARK(in_dev)    	IN_DEV_ORCONF((in_dev), SRC_VMARK)
#define IN_DEV_SOURCE_ROUTE(in_dev)	IN_DEV_ANDCONF((in_dev), \
						       ACCEPT_SOURCE_ROUTE)
#define IN_DEV_ACCEPT_LOCAL(in_dev)	IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
#define IN_DEV_BOOTP_RELAY(in_dev)	IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)

#define IN_DEV_LOG_MARTIANS(in_dev)	IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
#define IN_DEV_PROXY_ARP(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP)
#define IN_DEV_PROXY_ARP_PVLAN(in_dev)	IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN)
#define IN_DEV_SHARED_MEDIA(in_dev)	IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
#define IN_DEV_TX_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
#define IN_DEV_SEC_REDIRECTS(in_dev)	IN_DEV_ORCONF((in_dev), \
						      SECURE_REDIRECTS)
#define IN_DEV_IDTAG(in_dev)		IN_DEV_CONF_GET(in_dev, TAG)
#define IN_DEV_MEDIUM_ID(in_dev)	IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
					IN_DEV_ORCONF((in_dev), \
						      PROMOTE_SECONDARIES)
#define IN_DEV_ROUTE_LOCALNET(in_dev)	IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net)	\
	IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)

#define IN_DEV_RX_REDIRECTS(in_dev) \
	((IN_DEV_FORWARD(in_dev) && \
	  IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
	 || (!IN_DEV_FORWARD(in_dev) && \
	  IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))

#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
	IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)

#define IN_DEV_ARPFILTER(in_dev)	IN_DEV_ORCONF((in_dev), ARPFILTER)
#define IN_DEV_ARP_ACCEPT(in_dev)	IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
#define IN_DEV_ARP_ANNOUNCE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
#define IN_DEV_ARP_IGNORE(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
#define IN_DEV_ARP_NOTIFY(in_dev)	IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
#define IN_DEV_ARP_EVICT_NOCARRIER(in_dev) IN_DEV_ANDCONF((in_dev), \
							  ARP_EVICT_NOCARRIER)

struct in_ifaddr {
	struct hlist_node	hash;
	struct in_ifaddr	__rcu *ifa_next;
	struct in_device	*ifa_dev;
	struct rcu_head		rcu_head;
	__be32			ifa_local;
	__be32			ifa_address;
	__be32			ifa_mask;
	__u32			ifa_rt_priority;
	__be32			ifa_broadcast;
	unsigned char		ifa_scope;
	unsigned char		ifa_prefixlen;
	__u32			ifa_flags;
	char			ifa_label[IFNAMSIZ];

	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
	__u32			ifa_valid_lft;
	__u32			ifa_preferred_lft;
	unsigned long		ifa_cstamp; /* created timestamp */
	unsigned long		ifa_tstamp; /* updated timestamp */
};

struct in_validator_info {
	__be32			ivi_addr;
	struct in_device	*ivi_dev;
	struct netlink_ext_ack	*extack;
};

int register_inetaddr_notifier(struct notifier_block *nb);
int unregister_inetaddr_notifier(struct notifier_block *nb);
int register_inetaddr_validator_notifier(struct notifier_block *nb);
int unregister_inetaddr_validator_notifier(struct notifier_block *nb);

void inet_netconf_notify_devconf(struct net *net, int event, int type,
				 int ifindex, struct ipv4_devconf *devconf);

struct net_device *__ip_dev_find(struct net *net, __be32 addr, bool devref);
static inline struct net_device *ip_dev_find(struct net *net, __be32 addr)
{
	return __ip_dev_find(net, addr, true);
}

int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
int devinet_ioctl(struct net *net, unsigned int cmd, struct ifreq *);
#ifdef CONFIG_INET
int inet_gifconf(struct net_device *dev, char __user *buf, int len, int size);
#else
static inline int inet_gifconf(struct net_device *dev, char __user *buf,
			       int len, int size)
{
	return 0;
}
#endif
void devinet_init(void);
struct in_device *inetdev_by_index(struct net *, int);
__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
__be32 inet_confirm_addr(struct net *net, struct in_device *in_dev, __be32 dst,
			 __be32 local, int scope);
struct in_ifaddr *inet_ifa_byprefix(struct in_device *in_dev, __be32 prefix,
				    __be32 mask);
struct in_ifaddr *inet_lookup_ifaddr_rcu(struct net *net, __be32 addr);
static inline bool inet_ifa_match(__be32 addr, const struct in_ifaddr *ifa)
{
	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
}

/*
 *	Check if a mask is acceptable.
 */
 
static __inline__ bool bad_mask(__be32 mask, __be32 addr)
{
	__u32 hmask;
	if (addr & (mask = ~mask))
		return true;
	hmask = ntohl(mask);
	if (hmask & (hmask+1))
		return true;
	return false;
}

#define in_dev_for_each_ifa_rtnl(ifa, in_dev)			\
	for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa;	\
	     ifa = rtnl_dereference(ifa->ifa_next))

#define in_dev_for_each_ifa_rcu(ifa, in_dev)			\
	for (ifa = rcu_dereference((in_dev)->ifa_list); ifa;	\
	     ifa = rcu_dereference(ifa->ifa_next))

static inline struct in_device *__in_dev_get_rcu(const struct net_device *dev)
{
	return rcu_dereference(dev->ip_ptr);
}

static inline struct in_device *in_dev_get(const struct net_device *dev)
{
	struct in_device *in_dev;

	rcu_read_lock();
	in_dev = __in_dev_get_rcu(dev);
	if (in_dev)
		refcount_inc(&in_dev->refcnt);
	rcu_read_unlock();
	return in_dev;
}

static inline struct in_device *__in_dev_get_rtnl(const struct net_device *dev)
{
	return rtnl_dereference(dev->ip_ptr);
}

/* called with rcu_read_lock or rtnl held */
static inline bool ip_ignore_linkdown(const struct net_device *dev)
{
	struct in_device *in_dev;
	bool rc = false;

	in_dev = rcu_dereference_rtnl(dev->ip_ptr);
	if (in_dev &&
	    IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
		rc = true;

	return rc;
}

static inline struct neigh_parms *__in_dev_arp_parms_get_rcu(const struct net_device *dev)
{
	struct in_device *in_dev = __in_dev_get_rcu(dev);

	return in_dev ? in_dev->arp_parms : NULL;
}

void in_dev_finish_destroy(struct in_device *idev);

static inline void in_dev_put(struct in_device *idev)
{
	if (refcount_dec_and_test(&idev->refcnt))
		in_dev_finish_destroy(idev);
}

#define __in_dev_put(idev)  refcount_dec(&(idev)->refcnt)
#define in_dev_hold(idev)   refcount_inc(&(idev)->refcnt)

#endif /* __KERNEL__ */

static __inline__ __be32 inet_make_mask(int logmask)
{
	if (logmask)
		return htonl(~((1U<<(32-logmask))-1));
	return 0;
}

static __inline__ int inet_mask_len(__be32 mask)
{
	__u32 hmask = ntohl(mask);
	if (!hmask)
		return 0;
	return 32 - ffz(~hmask);
}


#endif /* _LINUX_INETDEVICE_H */
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	#ifndef _LINUX_INETDEVICE_H
	3	#define _LINUX_INETDEVICE_H
	4
	5	#ifdef __KERNEL__
	6
31be3085	7	#include <linux/bitmap.h>
1da177e4	8	#include <linux/if.h>
4a5a8aa6	9	#include <linux/ip.h>
1da177e4 LT	10	#include <linux/netdevice.h>
	11	#include <linux/rcupdate.h>
	12	#include <linux/timer.h>
8bfe6d68	13	#include <linux/sysctl.h>
95ae6b22	14	#include <linux/rtnetlink.h>
7658b36f	15	#include <linux/refcount.h>
1da177e4	16
d94d9fee	17	struct ipv4_devconf {
1da177e4	18	void *sysctl;
ca7479eb TG	19	int data[IPV4_DEVCONF_MAX];
ca7479eb TG	20	DECLARE_BITMAP(state, IPV4_DEVCONF_MAX);
1da177e4 LT	21	};
1da177e4 LT	22
e9897071 ED	23	#define MC_HASH_SZ_LOG 9
e9897071 ED	24
d94d9fee	25	struct in_device {
1da177e4	26	struct net_device *dev;
c04438f5 ED	27	netdevice_tracker dev_tracker;
c04438f5 ED	28
7658b36f	29	refcount_t refcnt;
1da177e4	30	int dead;
2638eb8b	31	struct in_ifaddr __rcu ifa_list;/ IP ifaddr chain */
e9897071	32
1d7138de	33	struct ip_mc_list __rcu mc_list; / IP multicast filter chain */
e9897071 ED	34	struct ip_mc_list __rcu * __rcu *mc_hash;
e9897071 ED	35
1d7138de	36	int mc_count; /* Number of installed mcasts */
1da177e4 LT	37	spinlock_t mc_tomb_lock;
	38	struct ip_mc_list *mc_tomb;
	39	unsigned long mr_v1_seen;
	40	unsigned long mr_v2_seen;
	41	unsigned long mr_maxdelay;
966c37f2 HL	42	unsigned long mr_qi; /* Query Interval */
	43	unsigned long mr_qri; /* Query Response Interval */
	44	unsigned char mr_qrv; /* Query Robustness Variable */
1da177e4	45	unsigned char mr_gq_running;
b69dd5b3	46	u32 mr_ifc_count;
1da177e4 LT	47	struct timer_list mr_gq_timer; /* general query timer */
	48	struct timer_list mr_ifc_timer; /* interface change timer */
	49
	50	struct neigh_parms *arp_parms;
	51	struct ipv4_devconf cnf;
	52	struct rcu_head rcu_head;
	53	};
	54
02291680	55	#define IPV4_DEVCONF(cnf, attr) ((cnf).data[IPV4_DEVCONF_ ## attr - 1])
586f1211 PE	56	#define IPV4_DEVCONF_ALL(net, attr) \
586f1211 PE	57	IPV4_DEVCONF((*(net)->ipv4.devconf_all), attr)
42f811b8 HX	58
	59	static inline int ipv4_devconf_get(struct in_device *in_dev, int index)
	60	{
	61	index--;
	62	return in_dev->cnf.data[index];
	63	}
	64
	65	static inline void ipv4_devconf_set(struct in_device *in_dev, int index,
	66	int val)
	67	{
	68	index--;
31be3085	69	set_bit(index, in_dev->cnf.state);
42f811b8 HX	70	in_dev->cnf.data[index] = val;
	71	}
	72
71e27da9 HX	73	static inline void ipv4_devconf_setall(struct in_device *in_dev)
71e27da9 HX	74	{
ca7479eb	75	bitmap_fill(in_dev->cnf.state, IPV4_DEVCONF_MAX);
71e27da9 HX	76	}
71e27da9 HX	77
42f811b8	78	#define IN_DEV_CONF_GET(in_dev, attr) \
02291680	79	ipv4_devconf_get((in_dev), IPV4_DEVCONF_ ## attr)
42f811b8	80	#define IN_DEV_CONF_SET(in_dev, attr, val) \
02291680	81	ipv4_devconf_set((in_dev), IPV4_DEVCONF_ ## attr, (val))
42f811b8 HX	82
42f811b8 HX	83	#define IN_DEV_ANDCONF(in_dev, attr) \
c346dca1	84	(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr) && \
586f1211	85	IN_DEV_CONF_GET((in_dev), attr))
9eb43e76 ED	86
	87	#define IN_DEV_NET_ORCONF(in_dev, net, attr) \
	88	(IPV4_DEVCONF_ALL(net, attr) \|\| \
586f1211	89	IN_DEV_CONF_GET((in_dev), attr))
9eb43e76 ED	90
	91	#define IN_DEV_ORCONF(in_dev, attr) \
	92	IN_DEV_NET_ORCONF(in_dev, dev_net(in_dev->dev), attr)
	93
42f811b8	94	#define IN_DEV_MAXCONF(in_dev, attr) \
c346dca1	95	(max(IPV4_DEVCONF_ALL(dev_net(in_dev->dev), attr), \
586f1211	96	IN_DEV_CONF_GET((in_dev), attr)))
42f811b8 HX	97
42f811b8 HX	98	#define IN_DEV_FORWARD(in_dev) IN_DEV_CONF_GET((in_dev), FORWARDING)
01ecfe9b	99	#define IN_DEV_MFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), MC_FORWARDING)
5cbf777c	100	#define IN_DEV_BFORWARD(in_dev) IN_DEV_ANDCONF((in_dev), BC_FORWARDING)
27fed417	101	#define IN_DEV_RPFILTER(in_dev) IN_DEV_MAXCONF((in_dev), RP_FILTER)
28f6aeea	102	#define IN_DEV_SRC_VMARK(in_dev) IN_DEV_ORCONF((in_dev), SRC_VMARK)
42f811b8 HX	103	#define IN_DEV_SOURCE_ROUTE(in_dev) IN_DEV_ANDCONF((in_dev), \
42f811b8 HX	104	ACCEPT_SOURCE_ROUTE)
8153a10c	105	#define IN_DEV_ACCEPT_LOCAL(in_dev) IN_DEV_ORCONF((in_dev), ACCEPT_LOCAL)
42f811b8 HX	106	#define IN_DEV_BOOTP_RELAY(in_dev) IN_DEV_ANDCONF((in_dev), BOOTP_RELAY)
	107
	108	#define IN_DEV_LOG_MARTIANS(in_dev) IN_DEV_ORCONF((in_dev), LOG_MARTIANS)
	109	#define IN_DEV_PROXY_ARP(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP)
1af5318c	110	#define IN_DEV_PROXY_ARP_PVLAN(in_dev) IN_DEV_ORCONF((in_dev), PROXY_ARP_PVLAN)
42f811b8 HX	111	#define IN_DEV_SHARED_MEDIA(in_dev) IN_DEV_ORCONF((in_dev), SHARED_MEDIA)
	112	#define IN_DEV_TX_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), SEND_REDIRECTS)
	113	#define IN_DEV_SEC_REDIRECTS(in_dev) IN_DEV_ORCONF((in_dev), \
	114	SECURE_REDIRECTS)
	115	#define IN_DEV_IDTAG(in_dev) IN_DEV_CONF_GET(in_dev, TAG)
	116	#define IN_DEV_MEDIUM_ID(in_dev) IN_DEV_CONF_GET(in_dev, MEDIUM_ID)
	117	#define IN_DEV_PROMOTE_SECONDARIES(in_dev) \
	118	IN_DEV_ORCONF((in_dev), \
	119	PROMOTE_SECONDARIES)
d0daebc3	120	#define IN_DEV_ROUTE_LOCALNET(in_dev) IN_DEV_ORCONF(in_dev, ROUTE_LOCALNET)
9eb43e76 ED	121	#define IN_DEV_NET_ROUTE_LOCALNET(in_dev, net) \
9eb43e76 ED	122	IN_DEV_NET_ORCONF(in_dev, net, ROUTE_LOCALNET)
1da177e4 LT	123
	124	#define IN_DEV_RX_REDIRECTS(in_dev) \
	125	((IN_DEV_FORWARD(in_dev) && \
42f811b8	126	IN_DEV_ANDCONF((in_dev), ACCEPT_REDIRECTS)) \
1da177e4	127	\|\| (!IN_DEV_FORWARD(in_dev) && \
42f811b8	128	IN_DEV_ORCONF((in_dev), ACCEPT_REDIRECTS)))
1da177e4	129
0eeb075f	130	#define IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev) \
c0c5a60f	131	IN_DEV_ORCONF((in_dev), IGNORE_ROUTES_WITH_LINKDOWN)
0eeb075f	132
42f811b8	133	#define IN_DEV_ARPFILTER(in_dev) IN_DEV_ORCONF((in_dev), ARPFILTER)
124d37e9	134	#define IN_DEV_ARP_ACCEPT(in_dev) IN_DEV_ORCONF((in_dev), ARP_ACCEPT)
42f811b8 HX	135	#define IN_DEV_ARP_ANNOUNCE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_ANNOUNCE)
42f811b8 HX	136	#define IN_DEV_ARP_IGNORE(in_dev) IN_DEV_MAXCONF((in_dev), ARP_IGNORE)
eefef1cf	137	#define IN_DEV_ARP_NOTIFY(in_dev) IN_DEV_MAXCONF((in_dev), ARP_NOTIFY)
fcdb44d0 JP	138	#define IN_DEV_ARP_EVICT_NOCARRIER(in_dev) IN_DEV_ANDCONF((in_dev), \
fcdb44d0 JP	139	ARP_EVICT_NOCARRIER)
1da177e4	140
d94d9fee	141	struct in_ifaddr {
fd23c3b3	142	struct hlist_node hash;
2638eb8b	143	struct in_ifaddr __rcu *ifa_next;
1da177e4 LT	144	struct in_device *ifa_dev;
1da177e4 LT	145	struct rcu_head rcu_head;
a144ea4b AV	146	__be32 ifa_local;
	147	__be32 ifa_address;
	148	__be32 ifa_mask;
af4d768a	149	__u32 ifa_rt_priority;
a144ea4b	150	__be32 ifa_broadcast;
1da177e4	151	unsigned char ifa_scope;
1da177e4	152	unsigned char ifa_prefixlen;
ad6c8135	153	__u32 ifa_flags;
1da177e4	154	char ifa_label[IFNAMSIZ];
5c766d64 JP	155
	156	/* In seconds, relative to tstamp. Expiry is at tstamp + HZ * lft. */
	157	__u32 ifa_valid_lft;
	158	__u32 ifa_preferred_lft;
	159	unsigned long ifa_cstamp; /* created timestamp */
	160	unsigned long ifa_tstamp; /* updated timestamp */
1da177e4 LT	161	};
1da177e4 LT	162
3ad7d246 KJ	163	struct in_validator_info {
	164	__be32 ivi_addr;
	165	struct in_device *ivi_dev;
de95e047	166	struct netlink_ext_ack *extack;
3ad7d246 KJ	167	};
3ad7d246 KJ	168
f629d208 JP	169	int register_inetaddr_notifier(struct notifier_block *nb);
f629d208 JP	170	int unregister_inetaddr_notifier(struct notifier_block *nb);
3ad7d246 KJ	171	int register_inetaddr_validator_notifier(struct notifier_block *nb);
3ad7d246 KJ	172	int unregister_inetaddr_validator_notifier(struct notifier_block *nb);
1da177e4	173
3b022865 DA	174	void inet_netconf_notify_devconf(struct net *net, int event, int type,
3b022865 DA	175	int ifindex, struct ipv4_devconf *devconf);
d67b8c61	176
f629d208	177	struct net_device __ip_dev_find(struct net net, __be32 addr, bool devref);
82efee14 ED	178	static inline struct net_device ip_dev_find(struct net net, __be32 addr)
	179	{
	180	return __ip_dev_find(net, addr, true);
	181	}
	182
f629d208	183	int inet_addr_onlink(struct in_device *in_dev, __be32 a, __be32 b);
03aef17b	184	int devinet_ioctl(struct net net, unsigned int cmd, struct ifreq );
b0e99d03 AB	185	#ifdef CONFIG_INET
	186	int inet_gifconf(struct net_device dev, char __user buf, int len, int size);
	187	#else
	188	static inline int inet_gifconf(struct net_device dev, char __user buf,
	189	int len, int size)
	190	{
	191	return 0;
	192	}
	193	#endif
f629d208 JP	194	void devinet_init(void);
	195	struct in_device inetdev_by_index(struct net , int);
	196	__be32 inet_select_addr(const struct net_device *dev, __be32 dst, int scope);
b601fa19 ND	197	__be32 inet_confirm_addr(struct net net, struct in_device in_dev, __be32 dst,
b601fa19 ND	198	__be32 local, int scope);
f629d208 JP	199	struct in_ifaddr inet_ifa_byprefix(struct in_device in_dev, __be32 prefix,
f629d208 JP	200	__be32 mask);
6e617de8	201	struct in_ifaddr inet_lookup_ifaddr_rcu(struct net net, __be32 addr);
ef11db33	202	static inline bool inet_ifa_match(__be32 addr, const struct in_ifaddr *ifa)
1da177e4 LT	203	{
	204	return !((addr^ifa->ifa_address)&ifa->ifa_mask);
	205	}
	206
	207	/*
	208	* Check if a mask is acceptable.
	209	*/
	210
f06cc7b2	211	static __inline__ bool bad_mask(__be32 mask, __be32 addr)
1da177e4	212	{
714e85be	213	__u32 hmask;
1da177e4	214	if (addr & (mask = ~mask))
f06cc7b2	215	return true;
714e85be AV	216	hmask = ntohl(mask);
714e85be AV	217	if (hmask & (hmask+1))
f06cc7b2 YB	218	return true;
f06cc7b2 YB	219	return false;
1da177e4 LT	220	}
1da177e4 LT	221
ef11db33	222	#define in_dev_for_each_ifa_rtnl(ifa, in_dev) \
2638eb8b FW	223	for (ifa = rtnl_dereference((in_dev)->ifa_list); ifa; \
2638eb8b FW	224	ifa = rtnl_dereference(ifa->ifa_next))
ef11db33 FW	225
ef11db33 FW	226	#define in_dev_for_each_ifa_rcu(ifa, in_dev) \
2638eb8b FW	227	for (ifa = rcu_dereference((in_dev)->ifa_list); ifa; \
2638eb8b FW	228	ifa = rcu_dereference(ifa->ifa_next))
ef11db33	229
e5ed6399 HX	230	static inline struct in_device __in_dev_get_rcu(const struct net_device dev)
e5ed6399 HX	231	{
95ae6b22	232	return rcu_dereference(dev->ip_ptr);
e5ed6399 HX	233	}
e5ed6399 HX	234
95ae6b22	235	static inline struct in_device in_dev_get(const struct net_device dev)
1da177e4 LT	236	{
	237	struct in_device *in_dev;
	238
	239	rcu_read_lock();
e5ed6399	240	in_dev = __in_dev_get_rcu(dev);
1da177e4	241	if (in_dev)
7658b36f	242	refcount_inc(&in_dev->refcnt);
1da177e4 LT	243	rcu_read_unlock();
	244	return in_dev;
	245	}
	246
95ae6b22	247	static inline struct in_device __in_dev_get_rtnl(const struct net_device dev)
1da177e4	248	{
06a9701f	249	return rtnl_dereference(dev->ip_ptr);
1da177e4 LT	250	}
1da177e4 LT	251
331c7a40 DA	252	/* called with rcu_read_lock or rtnl held */
	253	static inline bool ip_ignore_linkdown(const struct net_device *dev)
	254	{
	255	struct in_device *in_dev;
	256	bool rc = false;
	257
	258	in_dev = rcu_dereference_rtnl(dev->ip_ptr);
	259	if (in_dev &&
	260	IN_DEV_IGNORE_ROUTES_WITH_LINKDOWN(in_dev))
	261	rc = true;
	262
	263	return rc;
	264	}
	265
1d4c8c29 JP	266	static inline struct neigh_parms __in_dev_arp_parms_get_rcu(const struct net_device dev)
	267	{
	268	struct in_device *in_dev = __in_dev_get_rcu(dev);
	269
	270	return in_dev ? in_dev->arp_parms : NULL;
	271	}
	272
f629d208	273	void in_dev_finish_destroy(struct in_device *idev);
1da177e4 LT	274
	275	static inline void in_dev_put(struct in_device *idev)
	276	{
7658b36f	277	if (refcount_dec_and_test(&idev->refcnt))
1da177e4 LT	278	in_dev_finish_destroy(idev);
	279	}
	280
7658b36f RE	281	#define __in_dev_put(idev) refcount_dec(&(idev)->refcnt)
7658b36f RE	282	#define in_dev_hold(idev) refcount_inc(&(idev)->refcnt)
1da177e4 LT	283
	284	#endif /* __KERNEL__ */
	285
60cad5da	286	static __inline__ __be32 inet_make_mask(int logmask)
1da177e4 LT	287	{
1da177e4 LT	288	if (logmask)
84bc8868	289	return htonl(~((1U<<(32-logmask))-1));
1da177e4 LT	290	return 0;
	291	}
	292
714e85be	293	static __inline__ int inet_mask_len(__be32 mask)
1da177e4	294	{
714e85be AV	295	__u32 hmask = ntohl(mask);
714e85be AV	296	if (!hmask)
1da177e4	297	return 0;
714e85be	298	return 32 - ffz(~hmask);
1da177e4 LT	299	}
	300
	301
	302	#endif /* _LINUX_INETDEVICE_H */